*ST清研今日大宗交易折价成交50万股，成交额755万元

Group 1 - The core point of the news is that *ST Qingyan conducted a block trade of 500,000 shares on November 4, with a transaction amount of 7.55 million yuan, accounting for 37.61% of the total transaction volume for that day [1] - The transaction price was 15.10 yuan, which represents a discount of 8.98% compared to the market closing price of 16.59 yuan [1] - The buyer was Everbright Securities Co., Ltd., and the seller was Guosen Securities Co., Ltd. [2]